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Dear antia66,+ [- N+ y0 y$ o) Y) F2 e4 ]
If damping factor is choosen 2, how about the natural freqency?$ [$ d7 }2 T8 j- v) A
Will the natural freqency changed with damping factor ?( O3 N" X d, G. }4 ?. Z0 v) J$ D
As my understanding, choose bandwidth <= 1/10*reference freq is for linear model is valid or not, that is, if need widther bandwidth PLL, the parameter from continuous model cannot provide expected PLL behavior.
$ ?, Z9 w( F ]; A% Y6 bHowever, VCO related noise causes the bandwidth cannot choosed to too high bandwidth.' B V- t `1 {) J1 {5 S
So, linear model is usually useful. |
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發表於 2010-1-20 15:40:27
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